Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f80f887012c307…

MALICIOUS

PDF

65.7 KB Created: 2021-01-29 13:01:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ff0ed9d5af547b231d024f2dbd89f755 SHA-1: 14c7d6e98d6dd05ad63dd3dc6b245a0eadfe415d SHA-256: a2f80f887012c307d35c258dd76f7c61d5623557a623ff5a5215728a3b633db7
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/wb?keyword=audio%20pro%20speakers%20where%20to%20buy In PDF document text
    • http://winclean-shop.space/iot_farming_companieszec01.pdfIn PDF document text
    • https://dezitatukuti.weebly.com/uploads/1/3/5/3/135389988/b3f9b01f9333c9d.pdfIn PDF document text
    • https://dowawanezezezo.weebly.com/uploads/1/3/1/0/131070762/8273604.pdfIn PDF document text
    • https://damozudi.weebly.com/uploads/1/3/0/7/130776403/8418720.pdfIn PDF document text
    • https://fanevatonalusi.weebly.com/uploads/1/3/1/6/131637928/a61b4029e071.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/ZJjhgjI/92776084608.pdfIn PDF document text
    • https://xaruxetadelu.weebly.com/uploads/1/3/4/4/134478950/tuxowowawe_zosisa.pdfIn PDF document text
    • https://guretaximijogu.weebly.com/uploads/1/3/0/7/130739376/583f00e218d0310.pdfIn PDF document text
    • http://parhelifrl.space/neo_emu_apk_1._5_370utmx.pdfIn PDF document text
    • https://cdn.sqhk.co/japewaturu/igja8jh/dragon_quest_8_3ds_alchemy_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutibigata.epizy.com/historical_perspective_of_nursing_informatics.pdfIn PDF document text
    • http://tuxiwifu.rf.gd/claim_for_home_carer_tax_credit_form.pdfIn PDF document text
    • http://kanusilos.epizy.com/dumodur.pdfIn PDF document text
    • http://werapitagu.rf.gd/army_iperms_record_manager_quiz_answers.pdfIn PDF document text
    • http://faxunarin.epizy.com/zajudewirupiwitokupawosa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F8 5404 bytes
SHA-256: b345d0880bd0d70671d19ba2f0cabd73318c6ad29e6dee3e9ae33d41630a9cff
font_01_sfnt_off0000d664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD664 9876 bytes
SHA-256: e7d3dff5fa76486ac13bb5400457a7b1896404cd566c4f06971fbcc09c8cb1e0